The FTC has declared they are the ethics police for bloggers:
Certainly, it seems like this is an update that’s time has come. While most well-run social media programs already include appropriate disclosure, there’s still no shortage of unscrupulous marketers using deceptive practices to sell products. Now, with the threat of serious fines, those who look to push the boundaries of ethical blogging will be doing so at their own risk.
I wonder if those advocating more government regulation are required to disclose their voting history, tax filings, and political donations.